Title:
PREPARATION METHOD FOR POLYCARBOXYLATE WATER REDUCER HAVING REGULAR SEQUENCE STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/129307
Kind Code:
A3
Abstract:
Disclosed is a preparation method for polycarboxylate water reducer having a regular sequence structure. The preparation method of the present invention comprises: performing Michael addition on acrylate polyethylene glycol ether ester macromonomer A and carboxylic acid containing an amine B; reacting for 5 to 12 hours and reducing the temperature to 0°C; adding acryloyl chloride by means of slow and even dripping; after dripping, continuing the reaction for 12 hours under room temperature to obtain polyether macromonomer C containing carboxyl; mixing fully the polyether macromonomer C containing carboxyl, a small molecular RAFT reagent, an initiator, and water; keeping the polymerization mass concentration between 30% and 60%; in an N2 atmosphere, raising the temperature to 60 to 80°C, and reacting for 2 to 5 hours to obtain the polycarboxylate water reducer having a regular sequence structure. The polycarboxylate water reducer obtained by means of the present invention is suitable for areas where sand construction aggregate has a high mud content, and has the advantages of low content, high water reduction, and high slump resistance. The preparation technique of the present invention is simple, the production process is green and environmentally friendly, and the production has a low cost.
Inventors:
ZHAI SHUYING (CN)
YANG YONG (CN)
ZHOU DONGLIANG (CN)
SHU XIN (CN)
RAN QIANPING (CN)
YAN HAN (CN)
ZHAO HONGXIA (CN)
YANG YONG (CN)
ZHOU DONGLIANG (CN)
SHU XIN (CN)
RAN QIANPING (CN)
YAN HAN (CN)
ZHAO HONGXIA (CN)
Application Number:
PCT/CN2019/076183
Publication Date:
August 08, 2019
Filing Date:
February 26, 2019
Export Citation:
Assignee:
SOBUTE NEW MAT CO LTD (CN)
BOTE BUILDING MAT TIANJIN CO LTD (CN)
NANJING BOTE NEW MAT CO LTD (CN)
BOTE NEW MAT TAIZHOU JIANGYAN CO LTD (CN)
BOTE BUILDING MAT TIANJIN CO LTD (CN)
NANJING BOTE NEW MAT CO LTD (CN)
BOTE NEW MAT TAIZHOU JIANGYAN CO LTD (CN)
International Classes:
C08F283/06; C04B24/26; C08F220/06
Foreign References:
| CN108059697A | 2018-05-22 | |||
| CN105153375A | 2015-12-16 | |||
| CN105175658A | 2015-12-23 | |||
| CN104311761A | 2015-01-28 | |||
| CN104016610A | 2014-09-03 | |||
| CN105713150A | 2016-06-29 | |||
| CN105669913A | 2016-06-15 | |||
| JP2000264695A | 2000-09-26 |
Attorney, Agent or Firm:
NANJING TIANYI PATENT AGENT CO., LTD. (CN)
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